docs: def event_matches(self, event, simple=False, keys=False):
          """
          Get list of matches played at an event.
  
          :param event: Event key to get data on.
          :param keys: Return list of match keys only rather than full data on every match.
          :param simple: Get only vital data.
          :return: List of string keys or Match objects.
          """
          if keys:
              return self._get('event/%s/matches/keys' % event)
          else:
              return [Match(raw) for raw in self._get('event/%s/matches%s' % (event, '/simple' if simple else ''))]